Consider adding other search providers such as Brave #57
Description
https://console.apify.com/actors/3ox4R101TgZz67sLr/issues/esOAEXvEtsDP9S7fM
Currently, the Actor only uses Google SEPRs, which is unpredictable and relatively slow. We could enable users to select other search providers, e.g. https://brave.com/search/api/